Regenerative glass-drawing furnace.



'w.-g.. M ONRO. REGENERATIVE GLASS DRAWING FURNACE.

APPLICATION FILED JUNE 23,1913.

Patented Oct. 19, 1915.

3 SHEETS-SHEET 1.

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WITNESSES w. L. MONRO.

REGENERATIVE GLASS DRAWING FURNACE.

APPLICATION FILED JUNE 23.. I9I3.

1,157,246. Patented (M19, 1915.

3 SHEETSSHEET 2 INVENTOR WITN ESSES $6M aw w. L. MONRO. REGENERATIVE GLASS DRAWING FURNACE.

APPLICATION FILED JUNE 23' 1913.

Patented Oct. 19, 1915.

3 SHEETS-SHEET 3- U ITE-D emmasPATENT cur os.-

WILLIAM-L. MoNRojoF PITTSBURGH, PENNSYLVANIA, 'AssIcNon tro wiNDowGLAss r rr rsnnnen, PENNSYLVANIA, A coRPoRATIo on NEW MACHINE corirANY, or JERSEY.

NEGENENATI'VE Grass-DRAWING rUnNAcn.

T0 aZZ whom it may concern: l

Be it known that I, WILLIAM L. MoNRo, a citizen of the United States, residing at Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Regenerative Glass-Drawing Furnaces, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification,

in which a F igure 1 i a longitudlnal vertical sect-ion showing a referred form of my furnace. Fig. .2 is a vertical section on the line IIII of Fig. 1, Fig. 3 is a horizontal section on the irregular. line IIIIII of Fig. 1, and Fig. 4 is a similarviewon the irregular line.

My'invention relates to regenerative fur mounted on-trunnions 3, and'provided wit top and bottom glass receiving cavities.

4 is a topstone, which may belifted or moved to allow turning over of the .pot. This pot sets in a refractory lined furnace 5,

the bottom. ofwhich opens'into a cave 6,v .pre-ferably having an. inclined bottom '7,-

which directs the glass drippings laterally. 8 is a tunnel opening into the bottom of the cave, this tunnel preferably being common to several of these caves, under several drawing pots, so that the attendant is given access to the glass d'rippings.

Two ports 9.and '10 open through the side wall of the furnace or cave, the lower port 10 leading from a combustion chamber 11, while port 9 is the outlet port. v shownthe port 10 and combustion chamber 11 as separated from the down-take port and channel by an inclined arched cap or sepaair is heatedby the outgoing products of combustion. .The gas is shown as entering a flue 14 whence it passes into a refractorychannel 14 extending through the upper Specification of Letters Patent. Patented Oct, 19, 1915,,

Application filed June 23,1913.' Serial No. 775,252.

nating in a nozzle 15' having preferably a jet opening which is reduced in size and which. directs the gas upwardly into the mixing and combustion chamber 11. hot air from the recuperator circulates around this gas passage 14 and mixes with the gas leaving the 'nozzle,being*carried up by the jet action of the gas as-well as bythe draft of the stack and the tendency of the heated air to rise. I

A The recuperator is providedwith horizontal rows of refractory pipes 16, which are spaced apart in each row, the pipes of one. row being preferably staggered relative to those of the adjacent rows aboveiand below it. The horizontal rowsof pipes. are separated by spaced part tiles 16 and the ends of the pipesopen into a-series of chambers 17 ,18, 19, 20-21 and 22 separated from each- 7 .other by bafiles 23. These baffles are shown as arranged so that there are two rows of pipes through which the products of com-' bustion pass, these products then passing down and flowing back, through the next pair'of rowsand so on fromthe top to -.the bottom. of the recuperator. The gases enter the chamber 17 through ports 24"and 25, shown-in Figs. 3 and 4, and fromthe chamber 26 they; pass down around the air inlet to the stack'flue 27. .The air entering through the channel 28 passes in under the supporting piers 29 and flows upwardly around therefractory-pipes or hollow tiles being given a more or less tortuous course by the. staggered arrangement of the tiles of the successive rows; The air thus rising ,becomes effectually heated by the heat trans-- mitted through the pipes and, enveloping the gas nozzle mixes with the issuing gas,

' the mixture turning in the combustion chamber and nozzle and entering the furnace while the products flow out through the superimposed take-down port. L

. It will be noted'that the air rises during heating in the recuperator, thus giving it its natural course; and that it is preheated by the outgoing, products of com giving a very efiicient recovery of heat from the waste gases. The fact that the recuperator is constructed in such a manner as to give a natural upward flow to the air .is an important one. Heretofore, in the opera.-

- tion of regenerative glass pot furnaces,.the

ustion, thus" I I regenerators have been of a type employing forced draft. In the operation of such furnaces, it has been found that it is impossible to prevent the deposition of carbon deposits on the pot to such an extent as to seriously injure the glass. This deposit of carloon is particularly objectionable in double cavity reversible pots.

The advantages of my invention result from the upward course of the air during heating, from the conduction of heat thereto,

from the waste product fiues; and also from the arrangement of the; jet inlet for the gas which aids in mixing and entraining the air as well as assisting the air flow. A high temperature is thus obtained for melting the glass out of the pot. a

In the operation oftlie furnace with a reversible pot, a glass article is drawn from the glass bath in the upper cavity of the pot,

while the refuse glass is being melted out of the lower cavity. The pot 1s then turned over, the cleaned out cavity is filled .with

fresh glass, and the refuse glass is melted out of the other cavity while the glass-draw operation goes on with the next batch.

I The furnace may be used for other purposes than heating glass pots, and many changes may be made in the form and arrangement of the furnace recuperator, etc,

without departing from my invention.

I claim.

A glass-drawing furnace having a well a drawing pot supported on the upper part of the well, the well having below the pot a side inlet port and a gas-supply nozzle projecting into said port, a recuperatorat one-side of said well having an outlet connection into said port, and an outlet passage from the well to the recuperator, said reeuperator having a natural draft upward and a drawing pot supported on the upper 1 'part of the well, the well having below-the pot a side inlet port and a gas-supply nozzle projecting into said port, a recuperator at one side of said well ha'vingan outlet'connection into said port, and an outlet passage from the well to the recuperator, said recuperatorhaving an air supply inlet at its lower portion and vertical up-fiow passages arranged to give a single natural draft uppass to the air from the inlet to said port,

substantially as described.

4. A glass-drawing furnace having a vertical well and a glass pot mounted at its upper portion, the well having an inlet port at one side thereof, and a gas supply discharging into said port. together with a recuperator arranged to deliver an upward flow of hot air into said port at the point of gas supply and beyond the IOCUPOliItOl', substantially as described.

In testimony whereof,

my hand.

WILLIAM L. )IONRO.

Witnesses:

, Amen A. TnILp,

HENRY CLARK.

I have hereunto set 

